Rotary disk drill.



H. H. HUGHES. ROTARY DISK DRILL.

APPLICATION FILED AUG.4I 1914.

2. fd 7 .I

5M/umm,

Patented Mar. 7, 1916.

i @ZZwhom #may concern.'

Be rit known that I, HOWARD itizenlof the United States, residing atv Houstoini-nthecountv of Harris, State of xas, have inventednew and useful Im-` "vements 'n i RotaryDisk Drills, of which he following is a specification.

` This` invention relates to a rotary disk drilhand particularly pertains .to improv`e` ents in rotarvdisk drills of that type in 7hich a "pair of revoluble cuttingdisks are mounted-in offset relation to each other on the opposite sides of the drill shank.

objectfot` thisinvention is to provide drill disk which isso constructed that ro.- tationthereotin relation to the. drill` shank will be* insured` when the drill is in operation,` thereby preventing` excessive wear*- on e cuttingedge` of `the disk. kAnother object R. HUGHES, f

is to increase the cutting :capacit'fA of the disk bv forming a series of iagonally disposed `cutting teeth on the edgeV thereotand to so shape the .teeth that henithe drillis operating in a heavy tena-` `spiral` shavingsbut *will be completely brokenA `up soy asto facilitate its removal by the washwater. i y

Another ob'ect is; to provide a` disk-drill '.liichfis equipped; with acutting disk hav-` af serrated cutting edge so shaped Athat `rruiterials adhering thereto' may be readily removed lbythe `flow of water through the lrill shank` the drill being .so designed. that vaterwill be directed between the serraions or teeth on the cutting;r disk in such rection as to effectively i tionsthereirom." Artur-ther objectis to providean efficient m'ans" for deliverin,egy lubricant to the bearings ofthe cuttingrdisk's while the drill is in ings aindat` the same time. insure easy rota tioirotithe` disks in relation* to the drillv shank. as the: latter revolves; It is also an object to provide a drill shank having a lubricant reservoir for holding a" lubricating.inedi'uni that is supplied i. the bearings ot the disks fwhen the drill in y operation, the` shank "structed that thefreservoir may be filled without removing the driii shank vfrom its 'rotating stenti` Specification of Letters i the oil and water ducts.

cious soil lthei soil` will not be formed in remove accumula operation to reduce` the wear on` the. bear` STATES PATENT OFFICE. :sovrano n.; HUGHES, or HOUSTON, TEXAS, Tissienes To SHARP-HUGHES TooL l l company, oT noUsToN, TEXAS, A CORPORATION or TEXAS. v

ROTARY yDISK DRILL.

Patent. Patented naar, 191e.

\ i Application led August 4, 1914. Serial No. 854,977.

The invention is illustrated in the accoinpanying drawings, in which;

Figure 1 is a view in side .elevation of a rotary disk drill constructed infaccordance with'this invention, with parts broken away toi'llustrate the manner' of directing lubricatlng oilto the bearings of the cutting disks,I and sli-owing the manner of directing the flow of wash-water through the drill shank between the serrations ot' the cutting disks. Fig'. 2 is a view at right angles to Fig. 1 with parts broken away to illustrate Fig. v3 isla horizontal section and plan on the line 3-3 of Fig.` 1. Fig. 4 isa detail in perspective of one of the cutting teetli as viewed from the rear face of the disk.

More specifically, indicates the head or Shank ofthe drill which is of general cylindrical shape with parallel flat faces 11 `formed 011 the opposite sides thereof which extend from the lower end of the shank 10 and terminate at a point a short distance below the upper end thereof. The upper end of the shankis formed with a tapered externally threaded portion 12 adapted to bescrewed into the ,drill stem on Iwhich the shank `10 is designed to be mounted.

Formed .on the flat faces 11 and extending at right angles thereto are arbors 12 which .lic in the saine-horizontal plane and are offset in relation to each other on opposite sides of the vertical rcenter of the shank 10. These arbors 12 are fitted with bushings 13 on which rotary cutting disks 14 are revolubly mounted; the cutting disks 14 being held in place on thearbors 12 by means of cap nuts I5, and being so designed and arranged that the advancing edges of same will form a hole through ".vhich'the drill can descend.

As a means for lubricating thcbearing of the disks 14 on the bushings 13, a central oil reservoir or borel is formed in the shank 10 extending longitudinallv thereof; the upper' end of the bore 16 terminating' at the upper end of the shank 10 and being threaded to receive a plug 17 formed'with a small aper- 100 ture 418 so as to lcause the flushing' water which passes downthrongh the drill stem toexert pressure on the lubricating medium in the reservoir 1,6. The lower end `of the bore 16 communicates Withtra'nsverse ducts 105 19 extending intoz'thearbors '12 and having i Vlateral branches 20 opcning'antl com1nuni-l eating with the perilihcries ot' the arhors 12` to perforations'll formed inthe bushings y13.

the arhors 12,' as before stateththe cuttingdisks 14 thereon"willfbe arranged in relation to the drill shankand eachfotlier asparticularly shown in;Fig.

disks will project lto one1 By offsetting `side of the drill shank'beyond the rearedge vthe directionl indicatedy byy the a'rroi'vf-ai'-` beyond the opposite v beyond the' rear `edge ofthe 'iirstlnamed 'ofi the other'disk.; which in turn projects side of the' drillgshank disk. y y l The outermost vporti-ons ot the disks constitute their vforward ory advancingedges, whiclnwlien the drill shank IO/isrot'ated in in Fig. will traverse a path indicated vby" thedotted'line eli-4 lin l"ig.`3. I .Toefect and insure arcontinuous.'cutting action of the disks 14 and also insure the rotation thereofon their arbors 12yas-the` shanklO is rotated` the disks'll are'provided at their peripheries with radially-dis posedL cutting teeth 22 which are separated vfroinfeach other' by means of slits or openings;l these teeth extendingv diagonally to the axes of the disks with their outer edges projecting inthe direction 'ofrota4 y tionl of' the-disksso as to present the in-` clined' edge and yrear face ofthe diskV y to the materials being 'cut in such manner 'the inclined edges and yrear L y teeth Willftend to rotate the disks on. their( that the resistance of the materials against faces of the arbore as'tlie drill shank revolves and ad` y Vances the forwardl cdgesof the-disks into the material being drilled.

f To insure a'cuttingaction ofthepdisks'fa's y ,they lare advanced' by the rotation of the ldrill shank the peripheral edges of the teeth arel beveled 4on their front `faces to""f0rm` 50, i l ting edgesand adjacent thereto; the grooves I y knife'edges as'particularly shown in Fig.4.

To `pwevent the formation of continuous shavings vWhere the `drill isoperating yin heavy tenacious soils, which tend to clogthe n drill hole. the 4teeth 22 are formed With` grooves 23 approximately semi-circulargin crossl section v which extend. transverselyk of the teeth parallel with their peripheral cut- 422' trperntin,9;v tojturn the. materialsf'severed fbythelperipheral cutting edges of the teeth y l and thereby cause the material to bel broken` "Int-order. tolprevent accumulations ofinii.-

' terials between the teeth 22 the disks and the shank ofthe drillysrtreams of of Water'ar'e directedagains't theinner faces (ofthe disksso -as t'o' pass between the teeth 22 as the disks revolve on their arborsgtlie '1 .n water being ejected from, the lower end` of Y the. 4shank( 10 through discharge orifices 24 connecting with ducts 25 leading ltfthe upper end` ofthe drill shank and openingy trate and shear the engaged. u n `Ween tlieteeth of the disks exertspressure' 80 u oil into the reservoir formed by theborel' 'A casion requires. u

v`What 1I claim is c. l

` tion of a solid shank or he'ad,v a, pair of roand between y I of-the head so astofprevent the;v` isin to lthe interior of 'thel advanceifl soiasl'to cause the teeth 20 to penesoil with winch they are The loosened soil crowding bed tatingpon vtheir arbors 12 as they Aare thus on 'theiinclined faces thereof tending to vro- .tate thedisks on their rarbors and vthus prex venting the cuttingedges of the disks from l becoming ivorn unevenly.

as wouldoccur if the disks did not revolve ontheir axes. 85 A constant stream of water is projected A against each disk ashefore stated toremove accumulations'from between the teeth 22 l and ralsocarry. away the materials loosened by thel disk; the water being delivered '90 throughthe drill' stem and the ducts 25 in f the drill shank. A lubricating medium contained in the bore v16 is delivered to the bearyings of the cuttingdisksby the pressure fof water thereon whichv 4enters the bore I6 95 through the aperture '18' in the plug 17,'thus maintaining. the bearings of the cutting 'disks in Aa lubricated condition.

As armeans for introducinglubricating '100.

without removing the drill shank from'its W stem a lateral bore 26 is formed in the drill shanklO- andis threaded to receive a plug- 27. The' plug 27 is removed to permit the.

introduction of 'o il into' the bore 16 vas oc m5 tatah'l'e cutting disks arrangedfvertifcalhi;` mi

g the dutside'o'f said yhead in parallel .relation to each `other `and lin'qsueh`r a `mannerfthat theygform a. hole through which the drill can descend by reason of their peripheral edge K portions shearing pff the material from-fthev side wall of the hole 'whenjthe head; is y"r0- tatfed, the axes offsnd: disks being :offset slightly in a. horizontal plane and each ott said disks havingfa;relatively thin edge por- .tionff provided.,with)ffdiagonallyLdisposed 120 teeth-; and mea-ns for' disharging'strea-msyof flushing water fromjthedo'wer en`dy 'ortiox'rl grated material:` `f"romrz.becoming up around lthe disksjor around said' heed..L

2. A rotarydiskdrill;comprisinga ri v shank, Aa. pain of; complementary cutting disks arrangedy in parallel relation to'leach othe'rand' revolublymounted fon the sides i y of mensa 'shank wat the tatoeages @rm ontheir horizontal diameters ofielation to each other, and diagonally ged teeth on the peripheries of Vsaid In, arotarydisk drilha Cutting disk ed with` a` series o/peripheral teeth, eth arranged in diagonal relation is ofthe disk landformed with bevperipheral edgesand having grooves on rearh `faces extending parallel .with eripheral edges.` y Ira` rotary `disk drill, a. cutting disk a seriesloff peripheral teeth larindiagonal relation to the axis `of diskha-ving grooves on :their .rear faces riding parallel" `"with, their peripheral adjacent thereto.

rotary disk drill, comprising a shank ed with water duets` opening at the endof" the shankin diagonal relatothe axis thereof, and a pairy of vrti- -disposed complementary cutting disks liiblymounted on the opposite sides of llankinparallel relation to each other armed With peripherallteeth between `,the waterfdischarged from the ducts ected, thefaxes of said disks being offset y in ahorizontal plane. n a rotary disk drill, a drill shank ng `jarhors extending outwardly from ldes `thereof and `formed with a bore tituting a lubricantreservoir with ducts ing from'said bore tothe outer faces of arbore, `an aperturedplug threaded in outer end of the bore,and a second plug adedfin a bore in the side of the shank municating with the first named bore.

`narotary boringdrill, the combinan f, a shank or lhead, a pair of rotatable ing disks arranged vertically on said lin parallelllrelation toeach other and ame will form a holethro-ugh Which the l" can descend, `the axes of said disks be- 'set slightly in a horizontal plane,4 and safor discharging streams of flushing from the loweiyend portionvof the 'entvthe disintegrated material from be- Y y, packed around the disks or around ,e ad, saidv disksibeingfprovided on their heral edges Airith diagonally disposed g'teeth. l e

rotary boring-` drill, comprising a rotatablefcutting `disk arranged on headin an upright position and proed` at` its periphery `with radiallydis diagonal cutting teeththat have Sharp ,hainanner that the advancing edges laterally against said disks so as to ancing'edges, and means for discharging a jet of water laterally from the head against one side of said disk so as to keep theteeth on same clean.

9. A cutting disk for rotary boring drills consisting of a `circular-shaped member `whose edge portion is made up of a plurality of diagonally-arranged cutting `teeth that are separated from each other by means of radial' slits, each tooth being provided on one `side Wit'ha groove that extends parallel to the outer lend of the tooth.

10. A rotary boring drill, comprising La head, a` pair of rotatable cutting disks arranged in an upright position on said head in parallel relation to each other and having their axes otl'set slightly in a horizontal plane, each of said 'disks being provided at its periphery with diagonally-disposed cutting teeth, and means for discharging streams of flushing water laterally 'from the lower end portion of `the head against the inner side faces of said disks.

11. A rotary boring drill, comprising a solid `head provided on its outer surface with a pair of vertically-disposed, flat bearing faces that lie parallel to each other, spindles on-the head that project laterally from said fiat bearing fares and which are offset or staggered slightly with relation to each other in a horizontal plane, 'cutting disks rotatably mounted on said spindles and provided at their peripheral edges with diagonally-disposed cutting teeth, and means for discharging water into the hole being foi-med so as to Hush out the disintegrated material and prevent it from becoming packed around the drill.

12. A rotary boring drill, comprising a head provided with a pair of vertically-disposed, i'lat` bearing fates that lie parallel to each other, integral spindles on the head thatproject' laterally from said flat hear- HOWARD R. HUGHES.

Y Witnesses:

MARGUERITE BA'rns. MARIE BA'r'rnY. 

